Civil Designer Showcase

NATIONAL ROUTE N7 SECTION 4 REPAIR & RESEAL WITH THE ADDITION OF CLIMBING LANES CLANWILLIAM TO TRAWAL - WESTERN CAPE

At Knowledge Base we are proud to showcase the achievements of our successful clients who continue to make a big difference through the work they do. HHO Africa (www.hho.co.za) is a well established and broad based consulting civil engineering company, recognised for their excellence in planning and design through numerous awards for technical excellence, innovative and environmental sensitivity.

The National Route N7 (Section 4) is a single carriageway which links the towns of Clanwilliam (km 0) and Trawal (km 42) in the Western Cape . The route is an essential national link between the Western Cape and Namibia.

HHO Africa were appointed by the South African National Roads Agency Soc Limited (SANRAL) to carry out the detailed assessment and design for the repair and reseal of the road pavement, bridge structures, drainage culverts and safety measures. The assessment included the Level of Service Study to add climbing lanes as well as geometric improvements at intersections near Trawal.

Features of the project include :
  • Carrying out detailed visual pavement assessment, topographical survey and environmental impact assessment
  • Carrying out condition assessment of bridges and culverts
  • Pavement material profiling and sampling
  • Materials behaviour assessment
  • Detailed repair and reseal strategy for pavement layerworks
  • Bridge maintenance and culvert widening
  • New bridge design
  • New climbing lanes and shoulder widening with extensive cut slope and fill slope widenings


HIGHWAY SERVICE AREAS
Minor repairs to existing bridge including joint replacement

 
HIGHWAY SERVICE AREAS
Pavement in fair condition. Significant edge breaks. Limited shoulders which are in need of widening as a major safety improvement


HIGHWAY SERVICE AREAS
Extensive rolling terrain climbs necessitating the addition of new climbing lanes


HHO Africa are responsible for the following :
  • All civil and structural design works
  • Traffic planning and management
  • Contract documentation and tender adjudication
  • Contract administration and construction monitoring
In addition to these projects HHO Africa have also acted as specialist advisors to Shell South Africa on other Ultra City service station projects all around SouthAfrica.


 
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